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Finding the Fourth Proportional to 20,574.99, 30,813.12 and 11,191.68

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Solution

The fourth proportional to 20,574.99, 30,813.12 and 11,191.68 is: 16,760.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.99 : 30,813.12 = 11,191.68 : x
  2. Step 2: Convert to fraction form
    20,574.99/30,813.12 = 11,191.68/x
  3. Step 3: Cross multiply
    20,574.99x = 30,813.12 × 11,191.68
  4. Step 4: Simplify right side
    20,574.99x = 344,850,578.84
  5. Step 5: Solve for x
    x = 344,850,578.84/20,574.99
  6. Step 6: Final answer
    x = 16,760.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.